css
/* -------------------------
   ESTILOS GENERALES

body {
    margin: 0;
    padding: 40px 20px;
    background-color: #1683c7;
    font-family: Arial, sans-serif;
    color: #222;
}


/* -------------------------
   CONTENEDOR PRINCIPAL
------------------------- */

.contenedor {
    max-width: 1000px;
    margin: auto;
    background-color: #d91e2b;
    padding: 25px;
    border: 5px solid #111;
    box-shadow: 8px 8px 0px #111;
}


/* -------------------------
   ENCABEZADO
------------------------- */

header {
    text-align: center;
    background-color: #b51220;
    color: white;
    padding: 25px;
    border: 3px solid #111;
}

header h1 {
    margin: 0;
    font-size: 38px;
}

header p {
    margin-bottom: 0;
    font-size: 18px;
}


/* -------------------------
   MENÚ
------------------------- */

nav {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 20px 0;
}

nav a {
    background-color: #111;
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    font-weight: bold;
    border: 2px solid white;
}

nav a:hover {
    background-color: #1683c7;
}


/* -------------------------
   CONTENIDO
------------------------- */

main {
    background-color: white;
    padding: 30px;
    min-height: 500px;
    border: 3px solid #111;
}

.entrada {
    max-width: 750px;
    margin: auto;
}

.entrada h2 {
    color: #d91e2b;
    font-size: 30px;
    border-bottom: 3px solid #1683c7;
    padding-bottom: 10px;
}

.entrada p {
    font-size: 18px;
    line-height: 1.6;
}


/* -------------------------
   PIE DE PÁGINA
------------------------- */

footer {
    text-align: center;
    color: white;
    margin-top: 20px;
}